Shrubs - British Ruellia (Purple)

British Ruellia, or Purple Ruellia, is a great shrub for landscape borders.  Evergreen, mostly herbaceous perennial shrub, quick to establish and grow to 3- to 6-feet tall with equal spread.  Becomes lush and full with age. Spreads moderately by underground rhizomes to form clumping colonies.  Ruellia flowers attract bees.  Deep purple foliage is colorful year-round. In Phoenix, purple, white or pink flowers are produced in all but coldest winter. 

Scientific name:  Ruellia brittoniana